From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com,
Jisheng Zhang <Jisheng.Zhang@synaptics.com>,
"David S . Miller" <davem@davemloft.net>,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH AUTOSEL 4.19 19/40] net: stmmac: dwmac1000: fix out-of-bounds mac address reg setting
Date: Wed, 15 Apr 2020 07:46:02 -0400 [thread overview]
Message-ID: <20200415114623.14972-19-sashal@kernel.org> (raw)
In-Reply-To: <20200415114623.14972-1-sashal@kernel.org>
From: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
[ Upstream commit 3e1221acf6a8f8595b5ce354bab4327a69d54d18 ]
Commit 9463c4455900 ("net: stmmac: dwmac1000: Clear unused address
entries") cleared the unused mac address entries, but introduced an
out-of bounds mac address register programming bug -- After setting
the secondary unicast mac addresses, the "reg" value has reached
netdev_uc_count() + 1, thus we should only clear address entries
if (addr < perfect_addr_number)
Fixes: 9463c4455900 ("net: stmmac: dwmac1000: Clear unused address entries")
Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
index 7b2a84320aabd..e4e9a7591efe9 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c
@@ -218,7 +218,7 @@ static void dwmac1000_set_filter(struct mac_device_info *hw,
reg++;
}
- while (reg <= perfect_addr_number) {
+ while (reg < perfect_addr_number) {
writel(0, ioaddr + GMAC_ADDR_HIGH(reg));
writel(0, ioaddr + GMAC_ADDR_LOW(reg));
reg++;
--
2.20.1
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prev parent reply other threads:[~2020-04-15 11:51 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-15 11:45 [PATCH AUTOSEL 4.19 01/40] clk: at91: usb: continue if clk_hw_round_rate() return zero Sasha Levin
2020-04-15 11:45 ` [PATCH AUTOSEL 4.19 04/40] soc: imx: gpc: fix power up sequencing Sasha Levin
2020-04-15 11:46 ` Sasha Levin [this message]
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